Here is a link to some excerpts from TMC newsletters that hopefully will help you identify when your rifle was made. The number marked on the barrel and receiver in line with the proof marks is the two digit year of manufacture. However, these earlier rifles did not utilize the rotary magazine for which the Mannlicher-Schoenauer and Steyr-Mannlicher firearms are famous. The M rifle in 9x56mm is another case. See the Mannlicher characteristics section for a complete listing of catalogued chamberings. Wednesday, February 28, Of course, a large part of this success was also related to the changes in firearms, marksmanship, and hunting styles as well.